Tate Multimedia has released several packs, ranging from cosmetic skins to new gameplay stages. Kao the Kangaroo update out now (version 1.4), patch notes

user wants a long article about "kao the kangaroo rom nsp update dlc switch upd". The keyword includes "rom nsp", which suggests Nintendo Switch ROM or NSP (Nintendo Submission Package) files, but this likely relates to homebrew or emulation. The user might also be interested in game updates, DLC, and the Switch version.

An file is the standard digital format used for games hosted on the official Nintendo eShop. It functions similarly to an installer package on a computer.